An error window about an unknown MIME type video/x-flic always appears at KDE session startup (I can't remember this on 5.9.0, but I might be wrong here). I don't get that message using my own compiled KDE 1.1 RPM's on RH 5.2, so it does not seem to be a generic KDE 1.1 problem. I don't know which package the problem is related to, it might be any KDE package.
this will be fixed for the release -- it is already fixed internally.